How to activity an error message at a shopping cart level?

Nov 24, 2016 at 11:52 AM|24 Views

Good Day Gurus

When I am creating a Purchase Order I get this error " Material 1100029 is not maintain for plant 4019". How can I convert this error message or configure its to pops up at a shopping cart level or activity its at a shopping cart level? I am using SRM 7 to creating Shopping carts and Purchase orders. Please help